Skin Background Off-Centered To Some Users? PLEASE HELP.

[killa seven]

Ok, well....I made a skin for the website, and it looks perfectly centered to me on both firefox and IE. Some users are getting the middle off centered. I don't understand why.

http://img535.imageshack.us/img535/7554/micwtfiends.jpg


Those lines hes seeing is supposed to be centered directly behind the forums, kinda like the body would be, but i made the body transparent.


this is what it looks like in the admin panel.


#CC9933 url(http://i49.tinypic.com/16nsea.jpg) no-repeat fixed;


Can anybody please tell me how to fix this, or if it is possible to fix?


Thanks ahead of time.

[Lynne]

How about a link to your site? With that background, you need a fixed width forum with pretty large margins. What are those settings?